Titanium Backup is not the easiest app to master, but it's loaded with useful features and does the excellent job of backing up apps and settings. The only fly in the ointment is the fact that Titanium Backup is a closed source commercial app. If this is a deal-breaker for you, or you prefer something less complicated, then oandbackup might be right up your alley.

All mainstream Linux distros offer a variety of backup tools designed for specific tasks like backing up MySQL databases or performing incremental backup to a remote server. Backupninja wraps all these nifty tools into a simple graphical interface and give you a helping hand with setting up backup jobs.

Android users who rely on the rsync utility to keep their data safe on Linux will most definitely appreciate the rsync Backup for Android app which endows an Android device with some serious backup powers.